Reed Instruments Psychrometer/Thermo-Hygrometer with Traceable Certification, 0% - 99.9% RH, -4°- 158° F ( -20° - 70° C ) (R6040-NIST)

Psychrometer/Thermo-Hygrometer with Traceable CertificationMeasures relative humidity, ambient temperature and dew point/wet bulb temperaturesBacklit LCD simultaneously displays selected temperature and relative humidityUser selectable °C or °FData Hold and MAX/MIN functionsUser adjustable alarms with visual indicatorsUser selectable sampling rateManual and auto data storageInternal memory stores up to 999 groups of dataView stored data, charts or real-time measurement with softwareLow battery indicator and auto shut off